import { PI } from "./data.js"

export function a(){
    return 'a'
}
export function b(){
    return 'b'
}
const c=100
let d=200
class E{}
export {c,d}
export function calcCircle(d){
    return d*PI
}
let a2=123
export default a2//默认导出
/*{
    a:...,
    b:...,
    c:...,
    d:...,
    default:123
} 

*/